Trying to find an environment variable that is available

Author: jmwright

setup.py

@@ -27,8 +27,10 @@
     is_rtd = os.environ["READTHEDOCS"]
 if "APPVEYOR" in os.environ:
     is_appveyor = os.environ["APPVEYOR"]
-if "TF_BUILD" in os.environ:
-    is_azure = os.environ["TF_BUILD"]
+if "System.TeamProjectId" in os.environ:
+    is_azure = True
+print("System.TeamProjectId" in os.environ)
+print("TF_BUILD" in os.environ)
 
 # Only include the installation dependencies if we are not running on RTD or AppVeyor
 if not is_rtd and not is_appveyor and not is_azure: